From nobody Thu Oct 03 04:08:02 2024 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4XJynt4GLMz5Xcfw for ; Thu, 03 Oct 2024 04:08:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XJynt2Xx0z4Nf3 for ; Thu, 3 Oct 2024 04:08:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1727928482; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nPZ1WH0d5HZR5oVldJwLR8N327vFSNzVI8q/DavRGYw=; b=exP1KYuR6Ef7xcm3FUTR5yBahD1BjRRyiq26wrbecw0UUTxqlC5+/2KR2DHK28Lj7n8xhH bG8VDR4DbscBwqOI8Hs8pOQ2zktCKIahOTBoraFL+Od+7O3SVb8KcYV8p6QseX+hdGCf1h Z2ukX4fBj6YhXKQT2akAUO0A61itXejLIh2Gq4HT63HopS3kUd6GLZkQUjoeTGKA41B2N5 Jd9KhZUw+ch2BA1erYcRagsZ8gcdK1fUxSKyExfidvxXXcyLx/edRpVpY0gHcibbCFQi/9 a1w0B15vGf/xOKNttGZuPxKxc6qShVwbvfDFfdSoGoav04kA5t+ySpDEi/0SwA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1727928482; a=rsa-sha256; cv=none; b=VDtMrgql/uzRliuWcMUGRl0nalVwWXVgfNkiyUNdht61ST4h7O/cfQjzbQNG1K8JpJWWkg tnfwy6FqW4tUPyvZnnoqRpKne2kiE1Sv9IrhjIy0ItwOT2Vqjhyw383ogPD6NIYwRZxego AuQRPd5dne+R/8kVjLt/5/wMC+DAKfLpV4iyh6+Hspw7wzg3ueyDGWqSfuLYzM66+rmHFA CaLItGp34XuxKtu18RtLSj9l9TgDPgsjsX/G6N64N4A6mMp1eEHDcjX+7tcnzvTSKfZbHd 6cUqkFpHGpSywsLPrVXbJDfpFAKbgvvSvFLKvir/jW/Fw7mPi7MVcBaY0/bx8A== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4XJynt28LVzbXp for ; Thu, 3 Oct 2024 04:08:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 493482kR005953 for ; Thu, 3 Oct 2024 04:08:02 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 493482HV005952 for net@FreeBSD.org; Thu, 3 Oct 2024 04:08:02 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 281560] gve (4) uma deadlock during high tcp throughput Date: Thu, 03 Oct 2024 04:08:02 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.1-RELEASE X-Bugzilla-Keywords: vendor X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kib@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281560 --- Comment #21 from Konstantin Belousov --- (In reply to shailend from comment #20) Then, this is especially looks like a live-lock. User thread should not have the priority 4, it is in the range of prioritie= s of the interrupt threads. Since the iperf thread owns the lock, and driver th= read contends for the lock, most likely it is the result of priority propagation. In other words, iperf thread must drop the lock to allow the system to make a progress. Perhaps it should do so after processing some fixed amount of work. --=20 You are receiving this mail because: You are the assignee for the bug.=